YASKAWA CIPR-GA50C series Technical Manual page 264

7.5 Minor Faults/Alarms
Code Name
EF7 External Fault (Terminal S7)
Note:
If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
Code Name
EP24v External Power 24V Supply
Note:
• Set o2-26 [Ext. Power 24V Supply Display] to enable or disable EP24v detection.
• The drive will not output an alarm signal for this alarm.
Code Name
FbH Excessive PID Feedback
Note:
• The drive detects this error if the PID feedback input is more than the level set in b5-36 for longer than b5-37.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in b5-12 [Feedback Loss Detection Select].
Code Name
FbL PID Feedback Loss
Note:
• The drive detects this error if the PID feedback input is lower than the level set in b5-13 for longer than b5-14.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in b5-12 [Feedback Loss Detection Select].
Code Name
HCA High Current Alarm
Note:
• The drive detects this error if the drive output current is more than the overcurrent alarm level (150% of the rated current).
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
Code Name
L24v Loss of External Power 24 Supply
Note:
• Set o2-23 [External 24V Powerloss Detection] to enable or disable L24v detection.
• The drive will not output an alarm signal for this alarm.
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Causes
MFDI terminal S7 caused an external fault through
an external device.
The wiring is incorrect.
External Fault [H1-07 = 2C to 2F] is set to MFDI
terminal S7, but the terminal is not in use.
Causes
The voltage of the main circuit power supply
decreased, and the 24 V power supply is supplying
power to the drive.
Causes
The FbH detection level is set incorrectly.
There is a problem with the PID feedback wiring.
The feedback sensor is not operating correctly.
A fault occurred in the feedback input circuit of the
drive.
Causes
The FbL detection level is set incorrectly.
There is a problem with the PID feedback wiring.
The feedback sensor is not operating correctly.
A fault occurred in the feedback input circuit of the
drive.
Causes
The load is too heavy.
The acceleration time is too short.
The drive is trying to operate a specialized motor or
a motor that is larger than the maximum applicable
motor output of the drive.
The current level temporarily increased because of
speed search after a momentary power loss or while
trying to Auto Restart.
Causes
The voltage of the backup 24 V power supply has
decreased. The main circuit power supply is
operating correctly.
Possible Solutions
1. Find the device that caused the external fault and remove the
caus.
2. Clear the external fault input in the MFDI.
Correctly connect the signal line to MFDI terminal S7.
Correctly set the MFDI.
Possible Solutions
• Examine the main circuit power supply.
• Turn ON the main circuit power supply to run the drive.
Possible Solutions
Adjust b5-36 [PID High Feedback Detection Lvl] and b5-37 [PID
High Feedback Detection Time].
Correct errors with the PID control wiring.
Examine the sensors on the control device side.
Replace the board or the drive. For information about replacing
the control board, contact Yaskawa or your nearest sales
representative.
Possible Solutions
Adjust b5-13 [PID Feedback Loss Detection Lvl] and b5-14 [PID
Feedback Loss Detection Time].
Correct errors with the PID control wiring.
Examine the sensors on the control device side.
Replace the board or the drive. For information about replacing
the control board, contact Yaskawa or your nearest sales
representative.
Possible Solutions
• Decrease the load for applications with repetitive starts and
stops.
• Replace the drive with a larger capacity model.
• Calculate the torque necessary during acceleration related to
the load inertia and the specified acceleration time.
• Increase the values set in C1-01, C1-03, C1-05, or C1-07
[Acceleration Times] until you get the necessary torque.
• Increase the values set in C2-01 to C2-04 [S-Curve
Characteristics] until you get the necessary torque.
• Replace the drive with a larger capacity model.
• Examine the motor nameplate, the motor, and the drive to
make sure that the drive rated current is larger than the motor
rated current.
• Replace the drive with a larger capacity model.
If speed search or Auto Restart cause an increase in current, the
drive can temporarily show this alarm. The time that the drive
shows the alarm is short. No more steps are necessary to clear the
alarm.
Possible Solutions
• Examine the external 24 V power supply for disconnected
wires and wiring errors and repair the problems.
• Examine the external 24 V power supply for problems.
YASKAWA SIEPC71061753A GA500 Technical Manual